Charge refers to the fundamental property of matter that causes it to experience a force when placed in an electromagnetic field. Electric charge exists in two types: positive and negative, which attract or repel each other based on their nature. Understanding electric charge is essential for grasping concepts in physics and mathematics related to electromagnetism. For a deeper exploration, readers are encouraged to consult general articles on the topic or ask more specific questions. This foundational knowledge is crucial for further studies in physics.